Monthly update for Sellers Auto / Artist Studio petroleum cleanup site 489201547 / 489201548 (fifth update- March 2, 2007)

From: Damon.Taylor@ocfl.net [mailto:Damon.Taylor@ocfl.net]
Sent: Fri 3/2/2007 4:47 PM
To: Mills, Louise P21324
Cc: hortonra@terramaxinc.com; Renee.Parker@ocfl.net; Carlos.Gonzalez2@ocfl.net
Subject: Monthly update for Sellers Auto / Artist Studio petroleum cleanup site
489201547 / 489201548 (fifth update- March 2, 2007)

Ms. Mills,

I would like to take this opportunity to give you our fifth monthly update on
the project.

The FDEP & delegated local program, Orange County Environmental Protection
Division (EPD) have an open Work Order with Terramax to operate the recently
constructed remediation system.

Startup of the system occurred during the week of February 19th, with the
startup sampling occurring on February 22nd and February 23rd. Preliminary data
has already indicated that the system is removing petroleum mass at a fast rate.
February 22, 2007 is the beginning of our four-year clock to cleanup the site.
Of course, we strive to complete it much faster than this if possible.

We expect to receive the startup report that documents all of the various parts
of the startup and the overall efficiency of the system by next week or so.
Subsequently, the first quarterly report will be due in mid June. This report
will contain the first quarterly operational data as well as the first
groundwater sampling data after startup. Usually, we see large drop in the
concentrations of contaminants in this report. I will be sure to copy you on all
of Orange County’s review letters. The reports will be available though the
oculus website (http://dwmedms.dep.state.fl.us/Oculus/servlet/login), but in
case oculus is not updated fast enough, please contact me for excerpts of the
reports.

As you may remember from the Remedial Action Plan and past discussions, the
remediation system at this site is a multiphase extraction system, which
includes 24 submersible groundwater pumps each located in a vertical well that
is also capable of extracting vapors above the water table. The contaminated
groundwater pumped from each well into a common underground header pipe that
leads to the remediation building for treatment and then is pumped back to the
infiltration gallery in the gravel parking lot on the corner of Midway and
Philadelphia. While the groundwater is pumped and treated, a vacuum is applied
above the water table to all of these treatment wells and vapors are extracted
to the remediation building and treated. There are also 8 biosparge wells by
the lakeshore for low flow sparging to create a sparge curtain.

It is not uncommon with complicated systems like this that there are initial
problems that must be dealt with to maximize the efficiency of the system.
Below are problems we are aware of so far:

* The soil vapor extraction system (SVE) is currently down due to water in the
lines and due to a noise complaint from the neighbor across the street. The SVE
system is turned on periodically during the day to monitor it and to keep the
system viable as often systems will fail if they are left off too long. The
water in the lines is a problem that Terramax is working on resolving by
lowering the vacuum/airflow until the groundwater table drops enough that the
vacuum/airflow may be increased again. There is a bleed valve on the equipment
that allows the vacuum/flow at each wellhead to be reduced. Typically the
rushing in of this bleed (dilution) air increases the overall noise of the
system. I am not sure yet if we need this valve open for very much longer, but
as I understand it, Terramax has tasked the equipment manufacturer with
modifying the valve/filter housing assembly soon. I think that they intend to
do this in the next week or so.

* As I understand it, the biosparging wells (the 8 by the lake) are not yet
turned on. These will need to be turned on as soon as possible.

* Although most of the wells are pumping pretty well, there are 4 or 5 of them
that have leaks in the treatment area. The equipment manufacturer is working on
this as well. I will be following up with Terramax on possibly reinstalling
one of the wells that may not have been drilled correctly and a submersible pump
was not able to be fit in it.

* The fence is not yet up. I learned today that the City of Orlando (Jim
Burnett) is working on the approval, but has not sent the official approval yet.
I am hoping next month the fence will be up.

I am pleased to report that we have finally began remediation and look forward
to reporting the progress to you as we get closer to our cleanup goals. Please
feel free to call me anytime if you need additional information or if you would
like me to find something in our files. Also. I am always available to meet you
onsite if you want to show me of any concerns you have.

Damon Taylor
Orange County Environmental Protection Division
Petroleum Cleanup Team
800 N. Mercy Drive, Suite 4, Orlando, FL 32808
Voice (407) 836-1480, Suncom 356-1480, Fax (407) 836-1417

Hello everyone:

Here is the latest monthly update from the Orange County Environmental
Protection Department regarding the Sellers Auto / Artist Studio
petroleum cleanup site on Philadelphia Avenue.

I asked a question in addition to the report this month with regard to
the “privacy fence” they will erect on the site. All the details,
questions, and answers, are included below.

Have a nice weekend,

Louise
M. Louise Mills, Technical Writer
S4262 Generator Engineering Technical Publications
Siemens Power Generation, Inc.
4400 Alafaya Trail, Mail Code PR 701 Tech Pubs
Orlando, Florida 32826-2399
Telephone 407.736.4185
Facsimile 407.736.7175
Cellular 407.325.5510
email: louise.mills@siemens.com

—–Original Message—–
From: Damon.Taylor@ocfl.net [mailto:Damon.Taylor@ocfl.net]
Sent: Thursday, February 01, 2007 4:33 PM
To: Mills, Louise P21324
Subject: RE: Monthly update for Sellers Auto / Artist Studio petroleum
cleanup site 489201547 / 489201548 (fourth update- February 1, 2007)

As a follow-up regarding the fencing, the privacy fence is intended to
completely surround the remediation equipment located near Philadelphia
and South Lake Formosa Ave. It will be 8 ft tall in a box/rectangular
shape around the equipment building. The underground gallery won’t be
fenced though and can continue to function as a parking lot.

Let me know if you have any further questions.
Thanks,

Damon Taylor
Orange County Environmental Protection Division
Petroleum Cleanup Team
800 N. Mercy Drive, Suite 4, Orlando, FL 32808
Voice (407) 836-1480, Suncom 356-1480, Fax (407) 836-1417

—–Original Message—–
From: Mills, Louise P21324 [mailto:louise.mills@siemens.com]
Sent: Thursday, February 01, 2007 11:25 AM
To: Taylor, Damon
Subject: RE: Monthly update for Sellers Auto / Artist Studio petroleum
cleanup site 489201547 / 489201548 (fourth update- February 1, 2007)

Damon:
Can you tell me a little more detail with regard to the privacy
fence…Will it run the length of the chain link fence on Philadelphia
in front of the euipment in the trailer structure? or will it be a fence
that serves to house the equipment in the trailer, in other words, a
fence in a box shape around just that equipment? I am trying to picture
the extent of the described privacy fence/structure…I assume no
fencing will go around the equipment structures buried at the corner of
Midway and Philadelphia.
It is unfortunate that OUC is taking longer to get the electrical
completed so you all can “throw the switch” and begin remediation of the
site.
Meanwhile, as always, I appreciate the monthly updates.
Louise

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